A.1010~1011個/kg B.1012~1013個/kg 1315C.10~10個/kg D.1014~1016個/kg
A.減少,降低 B.升高,升高 C.降低,升高 D.升高,降低
A.穩(wěn)定 B.腐熟 C.需氧 D.后期